EM field, charged particle tracking and scattering simulations
Dr. Ferenc Glück (Institut für Experimentelle Kernphysik, KIT Karlsruhe)

In order to design the electrodes and the coils of many particle physics experiments (like aSPECT and KATRIN), and to investigate and understand the various background processes and systematic effects of these experiments, accurate electric and magnetfic field, charged particle tracking and scattering computations are needed.
Various simulation techniques are presented in this talk:
A) EM field: boundary element method (direct and iterative solving), zonal harmonic expansion for axisymmetric fields, FFTM for 3D fields.
B) Relativistic charged particle tracking with 8th order Runge-Kutta method and various time step controls; adiabatic approximation.
C) Electron scattering with various molecules and atoms (H2, N2, …) The C++ code packages Kassiopeia, Kemfield and KGeobag will be also introduced.